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I'm going to say no because there are more fire types I like that need the fire stone to obtain (Flareon, Arcanine, Ninetales). There's more of a plethora of options for water types without a stone.
I'll give a personal army 10 million castforms for a kyogre.
Yes, I will give you my dusk stone. Though I have used it in past for Chandelure and Mismagius, the shiny stone is more precious, because I need it for Togekiss, my favorite gen 4 mon. I always raise Togekiss if I can get Togepi in game. I also use shiny stones sometimes for Florges.
Your bike and running shoes for these two master balls?